It is used because of its relatively small size and its relatively small genetic code. Plants need nitrogen to survive, but they cannot take it up directly. They have to take up nitrates and convert them to nitrogen. Because of this, plants have developed high-performance ways to take up nitrates because they are found in low concentrations. Their intake systems are so complex, they are able to take in just what they need, and not all that is available.
By using the genes from two bacteria producing organisms such as Alcaligenes Eutrophus, they could insert them into cress plants with the aim of these plants producing the PHB. This process worked and the plants and some of their offspring produced around 14% of the dry weight as PHB. Although this is not as high yielding as when it is produced in the petri dishes, it is a much more economically viable method of production and hence would give a much more substantial impact to society. Chemically PHB is from a group of biopolymers known as the polyhyroxyalkanoates. Figure 1 below shows other examples of biopolymers in
1) Monocots are shorts for “Monocotyledons” which means plants whose embryo has one cotyledon; whereas, Eudicots (Eudicotyledons) carry embryo with 2 cotyledons. The cotyledons of eudicots supply nutrients for seedlings, but the cotyledons of monocots store some nutrients and act as a transfer tissue for nutrients stored elsewhere. Five key features are typically used to distinguish monocots from eudicots; a seed, arrangement of vascular tissue in roots, stems, and leaves, and number of flower parts. The seed has the reproductive structures that are protected from drying out, have male and female gametophytes which are reduced in size. In young dicot stems and stems (usually the upright, vertical portion of a plant transports substances to and the leaves) that do not increase in thickness, xylem and phloem are arranged in vascular bundles in the cortex.
Describe how the use of plant fibres and starch may contribute to sustainability Plant fibres such as hemp, jute, manila, flax and sisal have been used for centuries to make ropes, paper and cloth. They usually have to be extracted from the plant first. The fibres are very long sclerenchyma cells and xylem tissues and are usually very tough and cellulose and lignified cellulose are not easily broken down either by chemicals or by enzymes. On the other hand, the matrix of pectates and other compounds around the fibres, lignin included, can usually be dissolved or removed. Plant fibres are known for having great tensile strength and therefore cannot be easily broken by pulling.
Plant Structure. LEAVES: · Leaves are the plant organs where most photosynthesis occurs. Their broad flattened structure optimizes the surface area exposed to light. Plant morphologists have developed a hypothesis, supported by scientific evidence, that leaves are flattened stems between which tissue has developed. · The shape and structure of leaves vary considerably from species to species of plant, depending largely on their adaptation to climate and available light, but also to other factors such as grazing animals, available nutrients, and ecological competition from other plants.
A tropism is a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus. In tropisms, this response is dependent on the direction of the stimulus. Viruses and other pathogens also affect what is called "host tropism" or "cell tropism" in which case tropism refers to the way in which different viruses/pathogens have evolved to preferentially target specific host species, or specific cell types within those species. Tropisms are usually named for the stimulus involved. There are many types of tropisms.
PURPOSE The purpose of this experiment is to determine whether magnets have an effect on the growth of radish seedlings. I became interested in the study of the effect magnets, when I discovered that magnets could make you heal faster. Later I decided that that it would be a better idea to study the effect of magnets on plants to keep it a safe experiment. The information gained from this experiment may be used to help gardeners growing radishes or other plants. HYPOTHESIS My hypothesis is that the stem of each plant will be attracted to the magnet.
But how many people know what nutrition, if the plant lives in water, is required in order for the plant to be fruitful? This is not common knowledge to most of the general population. Soil can provide nutrition for the plant and then some times use of fertilizers mixed with your water can replenish nutrition taken from the soil. With only the knowledge of keeping the soil slightly damp one can successfully grow most plants. When growing a plant in a hydroponic setup one might ask, how much nutrition should be put into the water and how?
One beneficial method of showing this trend is by using a microbial growth curve. There are four phases of this curve; the lag phase, the exponential phase, the stationary phase and the death phase. The Lag phase is the first phase of the curve and is often called an adjustment period. This is because there is no immediate increase in cell number, but cells are synthesizing new components. This phase is important for cells to repair any damaged components and produce any new necessary enzymes needed to thrive in the given medium.
The results showed that the increasing of the density leads to a decrease in the biomass of plants and that the experimental groups are not much different than the control groups. This shows that an environment can work to stabilize itself without human interruptions. Plants can ensure they don’t overpopulate an area by self-thinning and species can survive with predators using the environment they were given. Introduction Competition for resources is seen in all species and environments around the world. Since the Earth’s natural resources are limited, it necessary for species of all kingdoms to fight in order to gain enough nutrients in order to not only live but thrive and go on to produce future generations.